Chucks



June 30, 1970 H. TRIPP 3,517,940

- cHUcKs F d qct. 21, 1966 VENTO tJnited StateS Patent 3,517,940 CHUCKS Guy H. Tfipp, 209 N. columb1an Road, Bay cify, Mich. 48700 EHed oof. 21, 1000, sef. No. 507,827 Inf. cL B23b /22 U.s. CL 27955 3 c1a1ms ABSTRACT oE THE DISCLoSURE ThiS invention is to a chuck of the self-centering type vhich can be en1ployed vith toolS having both tapeTed and cylindTical Shanks.

ThiS invention felates to chnckS and Inofe Specifica1- ly pfovideS a dovice fof attaching to a lathe, dTn1 pTess, Screw Inachine, autoInatic o1 sinlilar Inachine having a fotadng oUtput Shaft Whefein the pfeSent invention nlay be l1tilized to SecoTely clan1p toolS, Work pieceS, bar stock, tubiI1g of vvofk foT fotation theTeof.

An obiect of this invention iS to pfovide a chuck having an in1pToved and novel structufe inc1Uding a 1I11ti licity of fadiany and aXially n1ovable iawS oircun1ferentiany Spaced in gripping and ungfipping position and vvi11 Wofk iI1 eitheT difection of stationaTy vvhen the Wofk is fotating.

Anothef object of thiS invention iS to pfovide a chuck Which iS extfeInely SiInple and eaSy in conStfuction and eaSy and quick to opeTate tho gfipping and ungfipping action, eSpecially, When opefated vvith air, hydraulical- 1y of electTically. It iS Wen adapted fo1 itS intended pur poSe, iS quite inexpensivo to InanufactUTe and aIII1oSt no expenSe to nlaintain.

A furtheT obiect of this invention is to pfovide a chuck that alvvayS confofnS to the Wofk to be held vvhethef tapef of Stfaight.

Yet another object of this i1vention iS to pTovide a n1Ultiplicity of fTee f1oating iaWs Inoving Tadially and aXially into gTipping action and nngTipping action, IneanS being pfovided fof accoInplishing said gTipping and ungripping action and at the San1e tine holding said iawS i1 uniSon fadially, axiaHy and 1ineafly whethef gripping in a tapeT, pafalle1 of any position Within the capacity of the hefein descfibed chuck. Said iavvS aTe pTovided vVith a I1111tiplicfy of tapefS affanged to coact vith the body anI1lllaf can1 and Inovable annulaf caIn and n1eans afe pTovided foT instantaneoos action, also IIleanS fo hold iaws in a norn1al ontward position.

TheSe objectS together vith other obiectS and advan tages vvi11 becoIne subsequently appaTent as they feside iI1 the detailS of constfuction and operation of the chuck aS n1oTe fully heTeinafteT descfibed and claiIned, fefeT- ence being made to the accompanying drawings fo1In ing a aTt theTeof whefein 1ike numeTalS Tefef to like paftS throughoot. l

F1(}. 1 iS a cfoss-Sectional vievV of an en1bodiInent of nly invention.

FIG. 2 is a cToSS-Section taken at 55 of FI(}. 4.

FIG. 3 iS a vieW of cone 30 in FI(}. 4 uSed fof 1ock iJ1g iWs in holding position When woTk is c1anlped by a'Ws.

The chock body 13 is a 1igid one piece conStfuction having an inWard 0afed conica1 shape 14 at one end, the opposite end being externany thTeaded to engage the inteTna1 thfeads in the thimble Sleeve nut 40, as at 35 in FIGl 1 and having a centfal counteT bofe 12 vvhich iS pafane1 With the longitudina1 axis of the body 13. The iI1terior of the chnck body 13 containS a nlultiplicity of cifcI1InfeTentially Spaced guide TibS 24, being a paft of the body 13, and paTallel to the longitudinal aXiS of the body 13 and extending inWafd fowafd the center, aS depicted in FIG. 2. A Inultiplicity of setS of strong Tigid iaws 20 afe dispoSed in grooveS 19, Which are fornled by fhe guide fibS 24, the iaWS 20 being Testfained ffon1 lafera1 n1oveITent thefeby. The intefio1 vva11 of the cone shaped end 14 of the body 13 has an arcoate shaped sufface 18 on annular can1 15, the in tefioI Wan of the oppoSite end iS so shaped as to be in cloSe felation to the Inovable cone 30 Which is con tfolled by the thin1ble nut 40 and has an innef aTcuate caIn SUTface 31. Slots 17 afe conStTUcted in and oXtend ing through the body 13 infeTmediate the endS of the body 13, anoWing aInple SPace for the axial tfave1 of eaTS 25 on the iaws 20 each Slot 17 being in aHgnment With each groove 10 and the eaf 25 on the iaW 20 con tained theTein. EXtefnal thfeadS aTe conStructed on the body 13 adiacent the sIotS 17 to engage the inteTna1 threadS of annular nut 15, as at 30 FIG. 1, Which has an annular gToove 27 in aHgnnlent Vvith eaTS 25 thuS holding the jaws 20 even axiany in Telation to each othof. The javvs 20 aTe constfucted vvith oafs 25 11aving an afcuate Shape 20, the oaTS 25 being connned within the sIofS 17 in the body 13 and gfooveS 27 in the annulaT nut 10. The eafS 25 on the favvS 20 take an afouate shape 20 to accoInInodate the n1oveInent of the iaws 20 as they move ffon1 the Straight gripping poSition, that iS paTalle1 to the 1ongitudinal axis of the body 13 to the tapef gfipping )osition. It can be seen that the endS of the earS 25 on the jaws 20 nlust Inove I1 and down whiIe the n1iddle of each of the iaws 20 iS pfactically StationaTy, the endS of the eaTS 25 being he1d SeoUTely in the annulaf gToovo 27 in the annulaf nut 10 thuS holding the iavvS even axially. The annulaf nut 10 can take the Shape of a sInooth annular Ting and can be aI1toIIlatically actuated by aif, hydfaulic of elecffica1 InechanisnlS. T11o iaws 20 have tapeTS 21 to coact vVith the aTcuate Sufface 18 of inneT annular can1 15; tapefS 22 on iavvS 20 afe contacted by innef afcuate annnlar caIn sufface 31 of cone 30. An annnlaf SpTing 28 throUgh the holes 20 in iaws 20 hold the iaws 20 in an outwaTd position in felation fo the longioldinal axis of chuck body 13 at the end of the chuck that TeceiveS the woTk piece. The innof arouato annulaf cam 31 of the Inovable cone 30 engages the tapeTS 22 of the iawS 20.

vVhen the annUlof nUt 15 is n1oved fofvaTC1 avvay fToII1 the thimble 11Ilt 40, it fofces the iavvS 20 into a c1aInp ing and locki11g action, then the cone 30 vvhich is in cloSe Ielation to co11nfe1 boTe 12 and Inovable theTein iS actuated by the thimble sleevo n11t 40 cauSing the cam SI11'face 31 on Inovable cone 30 to engage the tapers 22 on iawS 20 thuS locking the iaws 20 1inearly centrally and in eXact uniSon axially- The fevefse action unlocks the iaws 20 and allovvS then1 to Tnove into ungTipping poSition through the action of the spTingS 28.

FIG. 7 is a vievv of the Sido elevation of the invention conStfucted in accoTdance with the preSent invention and having a taper wofk piece Shown Within tho gTipping jaWS, FIG. 7, as the iaWS Wi11 conform to eithe1 tapef of stfaight wofk pieces.

FIG. 8 is a SectionaI view taken SUbstantially along the plane at 8-8 of FIG. 7 Showing the detailS of constf1ction and asseInbly of t11e chuck of the pfesent invention The chuck body 50, Shown in FIG, 7, iS a figid one piece constfuction having an invvaTd 0aTed conical Shape 51 at one end, the inner SUTface of the SaIne end being an arcuate shaped onnular caIn 52, and having a central bore 53 Which is paTanel with the longitodinal axiS of the body 50. A 1Tlultipilicity of grooves 55 afe lTlachined on the interior of the chnck body 50 and are cifcum ferontiany spaced thUS foTIning a multiplicity of fibs 54 Which are pafaHel to the longitudinal aXiS of the chnck body 50 and eXtend inward toward the center as Shown 

